Malicious PDF — malware analysis report

Static analysis result for SHA-256 46835ee4edc7c1d2…

MALICIOUS

PDF

91.9 KB Created: 2021-06-26 01:22:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: abd86b7bd91265d61391a4ffd6110702 SHA-1: d6e57f9ba23d0adb3ae0f3aec5b29c92d2a41115 SHA-256: 46835ee4edc7c1d25594d514cadeee2aac820bb2fb668a7c867be0ba5c4b0cfb
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. It contains numerous links to compromised CMS upload storage and disposable hosting, suggesting it's part of a link farm designed to redirect users to malicious sites. The embedded URLs and the nature of the heuristics point towards a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9822

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://penoplex24.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160a6356c4ef86---52358878856.pdf In PDF document text
    • http://lbhodgereunion.com/clients/3/38/38e1f81cb1ac74d12d86c8ba87866b9f/File/jikosedogepirizetizuwus.pdfIn PDF document text
    • http://mywayrtk.info/userfiles/file/pekatawasefurixovizoki.pdfIn PDF document text
    • http://geology.ie/wp-content/plugins/formcraft/file-upload/server/content/files/160794eca664d9---jiwisosikit.pdfIn PDF document text
    • http://legendtec-eg.com/wp-content/plugins/super-forms/uploads/php/files/1pjb69uo9gqv7u0qirqcqgo835/57622386304.pdfIn PDF document text
    • http://makesomenoise.hu/upload/file/25814459758.pdfIn PDF document text
    • https://advancedbusiness.co/wp-content/plugins/super-forms/uploads/php/files/969cc6cae213a325b83e0817f9d81418/11266345555.pdfIn PDF document text
    • http://www.ponderosafestival.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d5db566266---53620642579.pdfIn PDF document text
    • http://cloverpark1959.com/clients/51168/File/talivesikuxejolotonoliged.pdfIn PDF document text
    • http://www.kliningstroy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1607f4c390f749---bapejuw.pdfIn PDF document text
    • https://leavingcare3plus.ch/userfiles/files/nanuzog.pdfIn PDF document text
    • https://edukiya.com/wp-content/plugins/super-forms/uploads/php/files/dda02971a2f86e132c3b82d798265953/93456544378.pdfIn PDF document text
    • http://arohitourandtravels.com/userfiles/file/rolojeninalegivofoforum.pdfIn PDF document text
    • https://glosunspa.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c49a36e25b8---40783942697.pdfIn PDF document text
    • https://bykevin.com/wp-content/plugins/super-forms/uploads/php/files/65ab5513753bd02b633d7efd0f54d453/47027645519.pdfIn PDF document text
    • https://travelselection.us/wp-content/plugins/formcraft/file-upload/server/content/files/160a3e929683e6---xijodufosomamu.pdfIn PDF document text
    • http://www.amedna.com/userfiles/files/zadizemetobuxazema.pdfIn PDF document text
    • https://mebelpozakazu.ru/wp-content/plugins/super-forms/uploads/php/files/2ab08d5118cd7d90ba0532e1aab0ab68/98932158778.pdfIn PDF document text
    • http://gostium.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608bb2d094c9d---14771835671.pdfIn PDF document text
    • https://www.dazzlingdecor.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1609d51a25c6b4---37407446269.pdfIn PDF document text
    • http://519pf.com/userfiles/files/vasazivedozoregororovuduv.pdfIn PDF document text
    • http://jonkmp.nl/img/cms/file/riwixut.pdfIn PDF document text
    • http://paymentsbusiness.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1608d745b1db95---birifanoduzobid.pdfIn PDF document text
    • https://primeodontorj.com/wp-content/plugins/super-forms/uploads/php/files/e0695b10ef85fca187085ad0879262bf/99722121031.pdfIn PDF document text
    • http://accurateverdicts.com/wp-content/plugins/formcraft/file-upload/server/content/files/160929eac5662e---58265899339.pdfIn PDF document text
    • http://gdwtechnology.com/fckeditor/file/vumobalogelufaza.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=wake+up+in+the+sky+downloadPDF link annotation
    • http://lovewhereyoulv.wpengine.com/wp-content/plugins/super-forms/uploads/php/files/80f37c60735375d1c7641858a3b121c0/kelebenexedefefa.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010200.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10200 18744 bytes
SHA-256: 7607886fd1941a54646eb5e2d60b46ebca3b913db28081f64f7756c4d38d34cb
font_01_sfnt_off00013182.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13182 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00014999.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14999 10776 bytes
SHA-256: 32095b6a50e438b4393b64603795b4cca1d154b47a73a776e674af08c3385eac

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